/*
* Copyright 1998-2009 University Corporation for Atmospheric Research/Unidata
*
* Portions of this software were developed by the Unidata Program at the
* University Corporation for Atmospheric Research.
*
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* any fee or cost, to use, copy, modify, alter, enhance and distribute
* this software, and any derivative works thereof, and its supporting
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package thredds.wcs.v1_0_0_Plus;
import ucar.ma2.Range;
import ucar.ma2.InvalidRangeException;
import ucar.nc2.dataset.CoordinateAxis1D;
import ucar.nc2.dataset.CoordinateAxis;
/**
* _more_
*
* @author edavis
* @since 4.0
*/
public class AxisSubset
{
private static org.slf4j.Logger log =
org.slf4j.LoggerFactory.getLogger( AxisSubset.class );
private CoordinateAxis1D coordAxis;
private double min, max;
private int stride;
public AxisSubset( CoordinateAxis1D coordAxis, double minimum, double maximum, int stride )
{
if ( coordAxis == null )
{
log.error( "AxisSubset(): Minimum <" + minimum + "> is greater than maximum <" + maximum + ">." );
throw new IllegalArgumentException( "AxisSubset minimum <" + minimum + "> greater than maximum <" + maximum + ">." );
}
this.coordAxis = coordAxis;
if ( minimum > maximum )
{
log.error( "AxisSubset(): Minimum <" + minimum + "> is greater than maximum <" + maximum + ">." );
throw new IllegalArgumentException( "AxisSubset minimum <" + minimum + "> greater than maximum <" + maximum + ">." );
}
if ( stride < 1 )
{
log.error( "AxisSubset(): stride <" + stride + "> less than one (1 means all points)." );
throw new IllegalArgumentException( "AxisSubset stride <" + stride + "> less than one (1 means all points)." );
}
this.min = minimum;
this.max = maximum;
this.stride = stride;
}
public double getMinimum() { return min; }
public double getMaximum() { return max; }
public int getStride() { return stride; }
public String toString()
{
return "[min=" + min + ",max=" + max + ",stride=" + stride + "]";
}
public Range getRange()
throws InvalidRangeException
{
if ( ! this.coordAxis.isNumeric() )
{
log.error( "getRange(): GridCoordSystem must have numeric vertical axis to support min/max range." );
throw new IllegalArgumentException( "GridCoordSystem must have numeric vertical axis to support min/max range." );
}
int minIndex = this.coordAxis.findCoordElement( min );
int maxIndex = this.coordAxis.findCoordElement( max );
if ( minIndex == -1 || maxIndex == -1 )
{
log.error( "getRange(): GridCoordSystem vertical axis does not contain min/max points." );
throw new IllegalArgumentException( "GridCoordSystem vertical axis does not contain min/max points." );
}
if ( this.coordAxis.getPositive().equalsIgnoreCase( ucar.nc2.constants.CF.POSITIVE_DOWN ) )
return new Range( maxIndex, minIndex, stride );
else
return new Range( minIndex, maxIndex, stride );
}
}